On a scale of 1 - 10, how angry do you get at the thought of a black person arguing with you? You can be honest. How hard does it get your forehead vein throbbing? What if she's also a woman? I'm betting the very thought makes you turn tomato red.
The racism here is in the behaviour of treating some people specially because they are of "wanted" races or genders. I'm criticising racism, not engaging in it. But clearly a lot of people especially in the US are so far gone they'll never recognise it.